User interface for a portion of a display screen



FIG. 1 is a front view of a user interface for a portion of a displayscreen showing my new design; and,

FIG. 2 is an enlarged view of the region in FIG. 1.

The broken line showing of various regions forms no part of the claimeddesign. The broken line showing of the display screen is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a user interface for a portion of a display screen, as shown and described. 